7ec4e60819
send_pack() was declared to return "int" (although nobody cared), but didn't actually return anything.
292 lines
6.3 KiB
C
292 lines
6.3 KiB
C
#include "cache.h"
|
|
#include "pkt-line.h"
|
|
#include <sys/wait.h>
|
|
|
|
static const char send_pack_usage[] = "git-send-pack [--exec=other] destination [heads]*";
|
|
static const char *exec = "git-receive-pack";
|
|
|
|
static int path_match(const char *path, int nr, char **match)
|
|
{
|
|
int i;
|
|
int pathlen = strlen(path);
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
char *s = match[i];
|
|
int len = strlen(s);
|
|
|
|
if (!len || len > pathlen)
|
|
continue;
|
|
if (memcmp(path + pathlen - len, s, len))
|
|
continue;
|
|
if (pathlen > len && path[pathlen - len - 1] != '/')
|
|
continue;
|
|
*s = 0;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct ref {
|
|
struct ref *next;
|
|
unsigned char old_sha1[20];
|
|
unsigned char new_sha1[20];
|
|
char name[0];
|
|
};
|
|
|
|
static void exec_pack_objects(void)
|
|
{
|
|
static char *args[] = {
|
|
"git-pack-objects",
|
|
"--stdout",
|
|
NULL
|
|
};
|
|
execvp("git-pack-objects", args);
|
|
die("git-pack-objects exec failed (%s)", strerror(errno));
|
|
}
|
|
|
|
static void exec_rev_list(struct ref *refs)
|
|
{
|
|
static char *args[1000];
|
|
int i = 0;
|
|
|
|
args[i++] = "git-rev-list"; /* 0 */
|
|
args[i++] = "--objects"; /* 1 */
|
|
while (refs) {
|
|
char *buf = malloc(100);
|
|
if (i > 900)
|
|
die("git-rev-list environment overflow");
|
|
args[i++] = buf;
|
|
snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
|
|
buf += 50;
|
|
args[i++] = buf;
|
|
snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
|
|
refs = refs->next;
|
|
}
|
|
args[i] = NULL;
|
|
execvp("git-rev-list", args);
|
|
die("git-rev-list exec failed (%s)", strerror(errno));
|
|
}
|
|
|
|
static void rev_list(int fd, struct ref *refs)
|
|
{
|
|
int pipe_fd[2];
|
|
pid_t pack_objects_pid;
|
|
|
|
if (pipe(pipe_fd) < 0)
|
|
die("rev-list setup: pipe failed");
|
|
pack_objects_pid = fork();
|
|
if (!pack_objects_pid) {
|
|
dup2(pipe_fd[0], 0);
|
|
dup2(fd, 1);
|
|
close(pipe_fd[0]);
|
|
close(pipe_fd[1]);
|
|
close(fd);
|
|
exec_pack_objects();
|
|
die("pack-objects setup failed");
|
|
}
|
|
if (pack_objects_pid < 0)
|
|
die("pack-objects fork failed");
|
|
dup2(pipe_fd[1], 1);
|
|
close(pipe_fd[0]);
|
|
close(pipe_fd[1]);
|
|
close(fd);
|
|
exec_rev_list(refs);
|
|
}
|
|
|
|
static int pack_objects(int fd, struct ref *refs)
|
|
{
|
|
pid_t rev_list_pid;
|
|
|
|
rev_list_pid = fork();
|
|
if (!rev_list_pid) {
|
|
rev_list(fd, refs);
|
|
die("rev-list setup failed");
|
|
}
|
|
if (rev_list_pid < 0)
|
|
die("rev-list fork failed");
|
|
/*
|
|
* We don't wait for the rev-list pipeline in the parent:
|
|
* we end up waiting for the other end instead
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static int read_ref(const char *ref, unsigned char *sha1)
|
|
{
|
|
int fd, ret;
|
|
static char pathname[PATH_MAX];
|
|
char buffer[60];
|
|
const char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
|
|
|
|
snprintf(pathname, sizeof(pathname), "%s/%s", git_dir, ref);
|
|
fd = open(pathname, O_RDONLY);
|
|
if (fd < 0)
|
|
return -1;
|
|
ret = -1;
|
|
if (read(fd, buffer, sizeof(buffer)) >= 40)
|
|
ret = get_sha1_hex(buffer, sha1);
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
|
|
static int send_pack(int in, int out, int nr_match, char **match)
|
|
{
|
|
struct ref *ref_list = NULL, **last_ref = &ref_list;
|
|
struct ref *ref;
|
|
|
|
for (;;) {
|
|
unsigned char old_sha1[20];
|
|
unsigned char new_sha1[20];
|
|
static char buffer[1000];
|
|
char *name;
|
|
int len;
|
|
|
|
len = packet_read_line(in, buffer, sizeof(buffer));
|
|
if (!len)
|
|
break;
|
|
if (buffer[len-1] == '\n')
|
|
buffer[--len] = 0;
|
|
|
|
if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
|
|
die("protocol error: expected sha/ref, got '%s'", buffer);
|
|
name = buffer + 41;
|
|
if (nr_match && !path_match(name, nr_match, match))
|
|
continue;
|
|
if (read_ref(name, new_sha1) < 0)
|
|
return error("no such local reference '%s'", name);
|
|
if (!has_sha1_file(old_sha1))
|
|
return error("remote '%s' points to object I don't have", name);
|
|
if (!memcmp(old_sha1, new_sha1, 20)) {
|
|
fprintf(stderr, "'%s' unchanged\n", name);
|
|
continue;
|
|
}
|
|
ref = xmalloc(sizeof(*ref) + len - 40);
|
|
memcpy(ref->old_sha1, old_sha1, 20);
|
|
memcpy(ref->new_sha1, new_sha1, 20);
|
|
memcpy(ref->name, buffer + 41, len - 40);
|
|
ref->next = NULL;
|
|
*last_ref = ref;
|
|
last_ref = &ref->next;
|
|
}
|
|
|
|
for (ref = ref_list; ref; ref = ref->next) {
|
|
char old_hex[60], *new_hex;
|
|
strcpy(old_hex, sha1_to_hex(ref->old_sha1));
|
|
new_hex = sha1_to_hex(ref->new_sha1);
|
|
packet_write(out, "%s %s %s", old_hex, new_hex, ref->name);
|
|
fprintf(stderr, "'%s': updating from %s to %s\n", ref->name, old_hex, new_hex);
|
|
}
|
|
|
|
packet_flush(out);
|
|
if (ref_list)
|
|
pack_objects(out, ref_list);
|
|
close(out);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* First, make it shell-safe. We do this by just disallowing any
|
|
* special characters. Somebody who cares can do escaping and let
|
|
* through the rest. But since we're doing to feed this to ssh as
|
|
* a command line, we're going to be pretty damn anal for now.
|
|
*/
|
|
static char *shell_safe(char *url)
|
|
{
|
|
char *n = url;
|
|
unsigned char c;
|
|
static const char flags[256] = {
|
|
['0'...'9'] = 1,
|
|
['a'...'z'] = 1,
|
|
['A'...'Z'] = 1,
|
|
['.'] = 1, ['/'] = 1,
|
|
['-'] = 1, ['+'] = 1,
|
|
[':'] = 1
|
|
};
|
|
|
|
while ((c = *n++) != 0) {
|
|
if (flags[c] != 1)
|
|
die("I don't like '%c'. Sue me.", c);
|
|
}
|
|
return url;
|
|
}
|
|
|
|
/*
|
|
* Yeah, yeah, fixme. Need to pass in the heads etc.
|
|
*/
|
|
static int setup_connection(int fd[2], char *url, char **heads)
|
|
{
|
|
char command[1024];
|
|
const char *host, *path;
|
|
char *colon;
|
|
int pipefd[2][2];
|
|
pid_t pid;
|
|
|
|
url = shell_safe(url);
|
|
host = NULL;
|
|
path = url;
|
|
colon = strchr(url, ':');
|
|
if (colon) {
|
|
*colon = 0;
|
|
host = url;
|
|
path = colon+1;
|
|
}
|
|
snprintf(command, sizeof(command), "%s %s", exec, path);
|
|
if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
|
|
die("unable to create pipe pair for communication");
|
|
pid = fork();
|
|
if (!pid) {
|
|
dup2(pipefd[1][0], 0);
|
|
dup2(pipefd[0][1], 1);
|
|
close(pipefd[0][0]);
|
|
close(pipefd[0][1]);
|
|
close(pipefd[1][0]);
|
|
close(pipefd[1][1]);
|
|
if (host)
|
|
execlp("ssh", "ssh", host, command, NULL);
|
|
else
|
|
execlp("sh", "sh", "-c", command, NULL);
|
|
die("exec failed");
|
|
}
|
|
fd[0] = pipefd[0][0];
|
|
fd[1] = pipefd[1][1];
|
|
close(pipefd[0][1]);
|
|
close(pipefd[1][0]);
|
|
return pid;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int i, nr_heads = 0;
|
|
char *dest = NULL;
|
|
char **heads = NULL;
|
|
int fd[2], ret;
|
|
pid_t pid;
|
|
|
|
argv++;
|
|
for (i = 1; i < argc; i++) {
|
|
char *arg = *argv++;
|
|
|
|
if (*arg == '-') {
|
|
if (!strncmp(arg, "--exec=", 7)) {
|
|
exec = arg + 7;
|
|
continue;
|
|
}
|
|
usage(send_pack_usage);
|
|
}
|
|
dest = arg;
|
|
heads = argv;
|
|
nr_heads = argc - i -1;
|
|
break;
|
|
}
|
|
if (!dest)
|
|
usage(send_pack_usage);
|
|
pid = setup_connection(fd, dest, heads);
|
|
if (pid < 0)
|
|
return 1;
|
|
ret = send_pack(fd[0], fd[1], nr_heads, heads);
|
|
close(fd[0]);
|
|
close(fd[1]);
|
|
waitpid(pid, NULL, 0);
|
|
return ret;
|
|
}
|